<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>登陆</title>
</head>
<body>
<!-- 使用 form 表单, 实现登陆效果 -->
<form action="login" method="post">
    <input type="text" name="username">
    <input type="text" name="password">
    <input type="submit" value="登录">
</form>
</body>
</html>